Then they blatantly lied about it in a Congressional hearing.

The Department of Homeland Security collected data on Chicago residents accused of gang ties to test if police files could feed an FBI watchlist. Months passed before anyone noticed it wasn’t deleted.

SLOTKIN: So the fact we have ICE agents saying out loud to people they're trying to arrest that 'we're gonna put you in a database,' they are making that up?

LYONS: We do not do that

(wired.com)